Abranet is good for dust but doesn't provide such a fine finish in my opinion, but it might not matter for the gips. Then there is a vacuum cleaner connection available for orbital sanders. At least for my green Bosch, which I can't remember the numbers for by heart, but you have to look in the blue range.
Hand sanding without a vacuum cleaner is not something I personally want to recommend. Abranet and Giraffe are good tools but perhaps a bit narrow in their areas of use. I myself use a single-handed orbital sander called Festool ETS125 connected to a vacuum cleaner. Tried before with a two-handed grip but it doesn't give the same feel.
Aren't you complicating things now? This should be fine. We're talking about one room if I understand correctly.
Misconception, One room now and many more in the future... Why start the sanding career standing in a room where you and the whole room are covered in sanding dust?